CN201270429Y - Electricity supply device for electronic oil feeder control unit on ship diesel engine - Google Patents
Electricity supply device for electronic oil feeder control unit on ship diesel engine Download PDFInfo
- Publication number
- CN201270429Y CN201270429Y CNU200820152079XU CN200820152079U CN201270429Y CN 201270429 Y CN201270429 Y CN 201270429Y CN U200820152079X U CNU200820152079X U CN U200820152079XU CN 200820152079 U CN200820152079 U CN 200820152079U CN 201270429 Y CN201270429 Y CN 201270429Y
- Authority
- CN
- China
- Prior art keywords
- parts
- power supply
- output
- input
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005611 electricity Effects 0.000 title description 3
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 9
- 238000007667 floating Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000010759 marine diesel oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a power supply device of an electronic oil lubricator control unit on a marine diesel engine, wherein one end of an alternating current input stage component of the power supply device is connected with an external alternating current power supply, and the other end is connected with an AC/DC component, the AC/DC component is connected with a primary DC/DC component and a charger which are parallel, the primary AC/DC component is connected to an alternating current and direct current switching circuit, the charger is connected with a standby power supply, the standby power supply is connected to the alternating current and direct current switching circuit, the alternating current and direct current switching circuit is connected to a secondary DC/DC component, and the secondary DC/DC component is connected to the electronic oil lubricator control unit through a switching terminal row of a dynamic plate, and the primary DC/DC component, the secondary DC/DC component and the standby power supply are connected to a fault detecting and indicating circuit. The power supply device can provide uninterrupted stable direct current power supply, simultaneously has a charging function, and provides clean constant electric current which is no less than 12A to be output, and perfect circuits with protection are arranged in the power supply device, which comprise output over current, overvoltage and short circuit protection, and further has the functions of over heat protection and overdischarging of a power supply and the like.
Description
Technical field
The utility model relates to power supply unit, particularly a kind of dc suppling equipment that is used for the lubricated ALPHA electronic type oil ejector control unit of diesel cylinder sleeve.
Background technology
The cylinder sleeve of diesel engine is the strength member in the diesel engine, and it is bearing the HTHP of oil inflame generation and the friction of piston head in the course of the work.For the cylinder sleeve operate as normal, need avoid the serious accident generation of damage diesel engines such as scuffing of cylinder bore to being lubricated between cylinder sleeve and the piston head.Lubricating utensil ALPHA electronic type oil ejector replaces traditional mechanical formula oil ejector, bring more accurate oiling time point, enough oiling pressure, advantages such as accurate injection flow provide the good consumption of lubricating and saving expensive high temperature cylinder sleeve lubricating oil to cylinder sleeve, but brain---the oil ejector control unit of the equipment of oiling simultaneously, requirement to power supply is also very high, for the safe and reliable work of oil ejector control unit, the customization utility model be applicable to that large ship promotes mainly the into power supply unit of diesel engine electric minor oil ejector control unit.
Existing equipment is technical its intrinsic shortcoming:
(1) though the Ship Power Station also can power, but because the Ship Power Station self-capacity is limited, power consumption equipment is many, in other equipment operations, can cause the instability of electric current and voltage, when especially big equipment starts, supply variation too conference damages the oil ejector control unit, and the current ripples of Ship Power Station greatly also can cause the damage or the job insecurity of control unit in addition.So the power supply of Ship Power Station can not be satisfied the electricity consumption requirement of oil ejector control unit, bring very big damage risk to control unit, operation brings great especially risk to diesel engine then.
(2) in existing other power supply units, its technology is used for land better environment relatively more, can not be applicable to specific environment.It is fatal danger that foreign-going ship runs out of steam under sail, so very high to the reliability requirement of equipment, the fault of power-supply device can cause indirectly promotes mainly the into damage of diesel engine.And the environment of watercraft engine room is abominable, and long-term high temperature, high humidity, vibrations or the like unfavorable factor is that ship equipment must overcome.These unfavorable factors are especially great to the electric equipment influence.
(3) the narrow and small and hull of cabin space waves, and has specific (special) requirements, existing equipment to meet the demands to the fixed form of the overall dimension of equipment, device interior assembly and equipment in the mounting arrangements mode in cabin etc., needs specific customization.
The utility model content
The purpose of this utility model is to overcome above-mentioned problems of the prior art, and the dc suppling equipment of the lubricated ALPHA electronic type oil ejector control unit of a kind of diesel cylinder sleeve is provided.Utilize power supply unit of the present utility model that continual stable dc power supply can be provided, have charge function simultaneously, and provide the cleaning weighing apparatus that is not less than the 12A circuit to decide electric current output, should also provide overcurrent protection.
The technical solution of the utility model is as follows:
The power supply unit of electronic type oil ejector control unit on a kind of marine diesel, it is characterized in that, this power supply unit comprises interchange input stage parts, the AC/DC parts, DC/DC parts, AC-DC switching circuit, secondary DC/DC parts, charger, stand-by power supply, eight parts of fault detect and indicating circuit parts, described interchange input stage parts one end connects extraneous AC power, the other end connects the AC/DC parts, the output of described AC/DC parts connects the input of DC/DC parts in parallel and the input of charger, the output of DC/DC parts is connected to the input of described AC-DC switching circuit, charger is connected to described stand-by power supply, described stand-by power supply is connected to the input of described AC-DC switching circuit, described AC-DC switching circuit output is connected to the input of described secondary DC/DC parts, and the output of described secondary DC/DC parts is connected to electronic type oil ejector control unit; The output of the output of DC/DC parts, secondary DC/DC parts and the output of stand-by power supply all are connected to described fault detect and indicating circuit.
In order when serious overcurrent or overload take place, to protect, be provided with the over circuit between described stand-by power supply and the AC-DC switching circuit.
Needs for the installation and operation that is fit to the marine diesel oil machine equipment; eight parts of above-mentioned power supply unit adopt integrated design; form power module, storage battery and power plate three parts, be integrated with charger, stand-by power supply and over-discharge protection circuit in the described power module
With respect to prior art, the technical solution of the utility model has been brought following technique effect:
Because adopt modularization and cell design, the place can make the volume of power supply unit reduce, be fit to be positioned over that the electronic type oil ejector for marine diesel provides stable electric current on the ship.Owing to adopt modularized design, and three module layerings be positioned in the cabinet, cabinet is fixed on by the marine diesel, improved the stability and the dependability of power supply unit.Because adopted secondary DC/DC circuit, the output voltage of equipment is stable.Because adopted automatically all fill, the floating charge circuit, so improved the useful life of battery.Because adopt and over-discharge protection circuit, so guaranteed the safe handling of power supply.Because have autodiagnosis and indicating circuit,, more effectively guaranteed the power supply safety of power consumption equipment so can handle the fault of equipment timely or in advance.
Description of drawings
Fig. 1 is that the circuit of the power supply unit of electronic type oil ejector control unit on the utility model marine diesel is formed schematic diagram.
Fig. 2 is the contour structures schematic diagram of the power supply unit of electronic type oil ejector control unit on the utility model marine diesel.
Embodiment
Come the power supply unit of electronic type oil ejector control unit on the marine diesel of the present utility model done further elaborating below in conjunction with accompanying drawing and specific embodiment, but can not limit protection range of the present utility model with this.
The power supply unit of electronic type oil ejector control unit on a kind of marine diesel, this power supply unit comprises interchange input stage parts, AC/DC parts, DC/DC parts, AC-DC switching circuit, secondary DC/DC parts, charger, stand-by power supply, fault detect and eight parts of indicating circuit parts, its circuit connecting relation as shown in Figure 1, Fig. 1 is that the circuit of the power supply unit of electronic type oil ejector control unit on the utility model marine diesel is formed schematic diagram.As shown in the figure, interchange input stage parts one end in the circuit connects extraneous AC power, the other end connects the AC/DC parts, the output of described AC/DC parts connects the input of DC/DC parts in parallel and the input of charger, the output of DC/DC parts is connected to the input of described AC-DC switching circuit, charger is connected to described stand-by power supply, described stand-by power supply is connected to the input of described AC-DC switching circuit, described AC-DC switching circuit output is connected to the input of described secondary DC/DC parts, and the output of described secondary DC/DC parts is connected to electronic type oil ejector control unit; The output of the output of DC/DC parts, secondary DC/DC parts and the output of stand-by power supply all are connected to described fault detect and indicating circuit.
In order when serious overcurrent or overload take place, to protect, be provided with the over circuit between described stand-by power supply and the AC-DC switching circuit.
Needs for the installation and operation that is fit to the marine diesel oil machine equipment, eight parts of above-mentioned power supply unit adopt integrated design, as shown in Figure 2, Fig. 2 is the contour structures schematic diagram of the power supply unit of electronic type oil ejector control unit on the utility model marine diesel.Power supply unit after integrated comprises power module 1, storage battery 2 and power plate 3 three parts, is integrated with in the described power module 1 to exchange input stage parts, AC/DC parts, DC/DC parts, AC-DC switching circuit parts, secondary DC/DC parts, charger component and a fault detect and indicating circuit parts; Battery assembly module comprises the plumbic acid maintenance-free battery that two capacity are 20AH; Power plate 3 is made up of direct current input switch, direct current output switch, conversion terminal row and fault alarm relay.
Wherein modular form has also mainly been adopted in power module internal power loop, can improve the stability of whole power module like this, also can reduce the volume of power module simultaneously.All the filling automatically of electric power source pair of module battery, floating charge technology, battery float: when battery is in full state, charger can not stop charging, still can provide constant float charge voltage to supply with battery with very little floating current, because in case charger stops charging, battery can discharge electric energy naturally, so utilize the mode of floating charge, this discharge naturally of balance.Battery all fills: to decide the electric current and the mode of fixing time to battery charge, charging is very fast.Professional attendant during to battery maintenance through charge mode commonly used, this pattern also helps the chemical characteristic of activated batteries.
The charger of power module partly adopts the type voltage regulation constant current charge, can all fill automatically in charging process simultaneously, the conversion of floating charge.The capacity restoration that can effectively make battery like this can also effectively improve the useful life of battery simultaneously to maximum.
Because what battery damaged shared probability maximum is exactly that battery is by overdischarge.For drawing uninterrupted power supply the discharge loop of power supply has been increased over-discharge protection circuit.When the mistake that arrives battery when the voltage of battery was put, over-discharge protection circuit will cut off the discharge loop of battery, to reach the purpose of protection battery.
For the uninterrupted power supply of good assurance uninterrupted power supply, established comparatively comprehensively Self-Test Diagnostics circuit in the uninterrupted power supply.So that finding the fault of power supply timely also in time fixes a breakdown.
The entire circuit of the power supply unit of electronic type oil ejector control unit is made up of eight parts on the marine diesel, is respectively: exchange input stage part, AC/DC part, DC/DC part, AC-DC switching circuit part, secondary DC/DC part, charger part, battery part and a fault detect and an indicating circuit part.
Wherein, the effect that exchanges input stage is: carry out filtering and suppress the electromagnetism Interference that the inner HF switch of power supply produces exchanging input, make power supply have Electro Magnetic Compatibility preferably.
The effect of AC/DC part is: will be converted to the unstable voltage of corresponding direct current after AC rectification and the filtering.This circuit also comprises the input surge restraint circuit, and this circuit is to reduce the impact to input circuit.Can effectively protect the switching device of input.
The effect of a DC/DC part is: the unsettled higher voltage isolated variable that AC/DC is partly produced becomes the stable VD suitable with DC input voitage.DC/DC part is built-in output overcurrent, overvoltage, short circuit and overheating protection circuit.
The effect of alternating current-direct current commutation circuit is: the voltage that DC/DC part is produced and the input voltage of battery detect and control.When having the input of exchanging and exchange input when satisfying instructions for use, the input of secondary DC/DC part is switched in the output of a DC/DC part.When do not have to exchange input or exchange input can not satisfy instructions for use and have the direct current input time, the alternating current-direct current commutation circuit is transformed into direct-flow input end with the input of secondary DC/DC.To guarantee gapless continual direct current output.
The effect of secondary DC/DC part is: with the output or direct current input the carrying out voltage stabilizing of a DC/DC part.To obtain the direct current output that stable ripple is less.Secondary DC/DC part is also built-in output overcurrent, overvoltage, short circuit and overheating protection circuit.Carry end when breaking down when load, may enter into guard mode timely.In order to avoid damage load or power supply.
The effect of charger circuit is: battery is carried out the charging of constant current limited pressure.Follow the state according to charging simultaneously, automatic realization is all filled, the conversion of floating charge state.This kind charging modes helps the recovery of battery capacity, with the useful life of advancing also can effectively prolong power supply.
The effect of fault detect and indicating circuit is: parameters such as the output end voltage of the output voltage of power supply, output current, switch, battery input voltage, AC-input voltage are detected, and provide corresponding indication.When the battery input voltage is crossed when low, direct current input circuit that can power cutoff did not take place to put with the protection battery.
The effect of battery part is: under the situation that the input of exchanging is arranged, by the charger storage of electrical energy.When do not have to exchange input or exchange input instructions for use can not be satisfied the time, provide electric energy for load by secondary DC/DC part.
The DC uninterrupted power supply circuits that the utility model relates to, circuit structure is comparatively succinct, and cost is lower.And each several part circuit height maturation, its reliability is inevitable very high.Its debugging simultaneously is also more or less freely.There is the supplied by AC/DC electricity conversion speed fast again, can realizes the no gap power supply of real meaning.
Claims (3)
1. the power supply unit of electronic type oil ejector control unit on the marine diesel, it is characterized in that, this power supply unit comprises interchange input stage parts, the AC/DC parts, DC/DC parts, AC-DC switching circuit, secondary DC/DC parts, charger, stand-by power supply, eight parts of fault detect and indicating circuit parts, described interchange input stage parts one end connects extraneous AC power, the other end connects the AC/DC parts, the output of described AC/DC parts connects the input of DC/DC parts in parallel and the input of charger, the output of DC/DC parts is connected to the input of described AC-DC switching circuit, charger is connected to described stand-by power supply, described stand-by power supply is connected to the input of described AC-DC switching circuit, described AC-DC switching circuit output is connected to the input of described secondary DC/DC parts, and the output of described secondary DC/DC parts is connected to electronic type oil ejector control unit; The output of the output of DC/DC parts, secondary DC/DC parts and the output of stand-by power supply all are connected to described fault detect and indicating circuit.
2. the power supply unit of electronic type oil ejector control unit is characterized in that on the marine diesel according to claim 1, and the over circuit is set between described stand-by power supply and the AC-DC switching circuit.
3. the power supply unit of electronic type oil ejector control unit on the marine diesel according to claim 2, it is characterized in that, eight parts of power supply unit adopt integrated design, form power module, storage battery and power plate three parts, be integrated with in the described power module and exchange input stage parts, AC/DC parts, DC/DC parts, AC-DC switching circuit parts, secondary DC/DC parts, charger component and a fault detect and indicating circuit parts; Battery assembly module comprises the plumbic acid maintenance-free battery that two capacity are 20AH; The power plate unit is made up of direct current input switch, direct current output switch, conversion terminal row and fault alarm relay.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU200820152079XU CN201270429Y (en) | 2008-08-18 | 2008-08-18 | Electricity supply device for electronic oil feeder control unit on ship diesel engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU200820152079XU CN201270429Y (en) | 2008-08-18 | 2008-08-18 | Electricity supply device for electronic oil feeder control unit on ship diesel engine |
Publications (1)
Publication Number | Publication Date |
---|---|
CN201270429Y true CN201270429Y (en) | 2009-07-08 |
Family
ID=40843039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNU200820152079XU Expired - Lifetime CN201270429Y (en) | 2008-08-18 | 2008-08-18 | Electricity supply device for electronic oil feeder control unit on ship diesel engine |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN201270429Y (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101995881A (en) * | 2009-08-05 | 2011-03-30 | 中西金属工业株式会社 | Self-running carrying system adopting electric double-layer capacitor and secondary battery as power supply |
CN101997336A (en) * | 2009-08-05 | 2011-03-30 | 中西金属工业株式会社 | Self-running carrying system adopting electric double-layer capacitor and secondary battery as power supply |
CN102442217A (en) * | 2010-09-30 | 2012-05-09 | 中西金属工业株式会社 | Self-propelled conveying system with capacitor and secondary battery as power supply |
WO2018218883A1 (en) * | 2017-05-31 | 2018-12-06 | 广船国际有限公司 | Ship lubricating oil system and diesel generator set |
-
2008
- 2008-08-18 CN CNU200820152079XU patent/CN201270429Y/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101995881A (en) * | 2009-08-05 | 2011-03-30 | 中西金属工业株式会社 | Self-running carrying system adopting electric double-layer capacitor and secondary battery as power supply |
CN101997336A (en) * | 2009-08-05 | 2011-03-30 | 中西金属工业株式会社 | Self-running carrying system adopting electric double-layer capacitor and secondary battery as power supply |
CN101997336B (en) * | 2009-08-05 | 2014-09-24 | 中西金属工业株式会社 | Self-running carrying system adopting electric double-layer capacitor and secondary battery as power supply |
CN102442217A (en) * | 2010-09-30 | 2012-05-09 | 中西金属工业株式会社 | Self-propelled conveying system with capacitor and secondary battery as power supply |
CN102442217B (en) * | 2010-09-30 | 2015-06-17 | 中西金属工业株式会社 | Self-propelled conveying system with capacitor and secondary battery as power supply |
WO2018218883A1 (en) * | 2017-05-31 | 2018-12-06 | 广船国际有限公司 | Ship lubricating oil system and diesel generator set |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN206099484U (en) | aircraft electrical system | |
CN104081625B (en) | Switching power unit | |
CN106067692A (en) | Aircraft Electrical System and method of supplying power to thereof | |
CN101697429B (en) | Micro power consumption elevator | |
CN201270429Y (en) | Electricity supply device for electronic oil feeder control unit on ship diesel engine | |
CN102280924A (en) | Uninterrupted power supply system for relay protection device | |
CN205791785U (en) | Collection catalyst and converter are protected in the by-pass type Anti-electricity dazzling device of one | |
CN117175771A (en) | Multi-module networking automatic switching uninterrupted power supply system | |
CN201113483Y (en) | Inverter backup power supply system | |
CN107612007A (en) | A kind of light stores up energy accumulation current converter direct current low-voltage protection method in independent micro-capacitance sensor | |
CN103475055A (en) | Composite start power supply and circuit control method thereof | |
CN201530655U (en) | Micro-energy consumption elevator | |
CN104953614B (en) | Distributed generation resource grid-connection control system | |
CN103346612B (en) | 336VDC DC UPS system and method for supplying power to | |
CN215344073U (en) | Power supply system | |
CN116470583A (en) | Elevator self-power generation energy storage regulation and control method and system | |
CN205945101U (en) | Modular super battery | |
CN101794985A (en) | High-voltage direct-current (HVDC) system battery charging protecting circuit structure | |
CN203674697U (en) | Over-discharge automatic switching device for power substation storage battery set | |
CN202231481U (en) | Multi-stage direct-current conversion power supply device | |
CN208797565U (en) | A kind of overvoltage crowbar for direct current operative power source input | |
CN100394668C (en) | Uninterrupted power source for electric motor | |
CN220857702U (en) | Charging adapter unit and life-saving radio station | |
CN205014852U (en) | Automatic stringent control system of intermediate frequency furnace circulating water cooling | |
CN201663436U (en) | Battery charging protective circuit for high voltage direct current system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CX01 | Expiry of patent term |
Granted publication date: 20090708 |
|
CX01 | Expiry of patent term |